I'm having the problem without running EyeTV or Timemachine. No external HD is connected. The iMac will start up after a full shutdown every now and then, always during the night [1 AM], and, as far as I can see, no specific days.

I've been unplugging my iMac each night, which is a pain to remember to do, and when I plug it in each morning it automatically starts up. That suggests to me that if I hadn't unplugged it it would still be starting itself up each night. Let's hope the PRAM reset works.

If you don't have EyeTV installed you will have to look else where for the cause. I would remove and reinstall any software that could possible cause the problem. If all other possible causes are ruled out I suppose it would be safe to conclude that the problem is with Leopard.

I have the same problem and it is driving me nuts. If I forget to turn the volume down before I go to bed the Powerbook G4 starts up and Eyetv launches and I amwoken up to voices in the middle of the night. Even if I shut it down it will start up again a few hours later.

It is not a Leopard problem as my Powerbook is running Tiger!

I hae spoken to several techs at Applestores and no-one has heard of the problem. They suggested PMU reset which I have done to no avail.

Same problem here:MacBook CD (1. Gen) OS 10.5.1 wakes up at 1am- no external Hardware attached in any way besides power adaptor- no ARD- no TV software- Leopard only (no Windows)- Time Machine not activatedTemporary fix: I set the wakeup time to Monday at 6pm then it won't start at night, well only Mondays at 6pm.

Symptom: Mac wakes up every night at 1amHistory: once upon a time...a wakeup/fall asleep preference has been set and since removedConsequence: a valid Library/Preferences/SystemConfiguration/com.apple.AutoWake.plist file was created. Upon removing the wakup time from the preferences it was changed.The file then had the Tag for a wakeup time that did not contain a time. The system upun shutdown interpreted this as 1am/everyday and wrote that information into PRAM.Disarming:1. deleted com.apple.AutoWake.plist - this left the information in PRAM2. PRAM-Reset on next startup (cmd-opt-P-R)

Needed fix by Apple: Change the program that misinterprets an existing com.apple.AutoWake.plist with no time

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